What is Suck ?
Suck is (verb) 1. to hold something with your mouth and pull at it with your tongue The baby didn’t stop sucking his thumb until he was six. 2. to have something in your mouth which makes your mouth produce wa- ter He bought a bag of sweets to suck in the car. 3. to pull liquid into your mouth by us- ing the muscles in your mouth She sucked the orange juice through a straw.(noun) the action of sucking He’s had a lick of my ice cream and now he wants a suck of my ice lolly.
source: Easier English, Student Dictionary Upper Intermediate Level